[PATCH i-g-t RFC 08/13] lib/monitor_edids: Introduce helpers to get EDID from a monitor EDID

[Louis Chauvet <louis.chauvet@bootlin.com>]

Add two helpers around monitor_edid list: extracting an edid and edid list
for a specific connector type

Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
---
 lib/monitor_edids/monitor_edids_helper.c | 61 +++++++++++++++++++++++++++++++-
 lib/monitor_edids/monitor_edids_helper.h |  3 ++
 2 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/lib/monitor_edids/monitor_edids_helper.c b/lib/monitor_edids/monitor_edids_helper.c
index 1cbf1c22f0bb..cbd6d6fd54db 100644
--- a/lib/monitor_edids/monitor_edids_helper.c
+++ b/lib/monitor_edids/monitor_edids_helper.c
@@ -14,7 +14,10 @@
 #include <string.h>
 #include <assert.h>
 
-#include "igt_core.h"
+#include "igt.h"
+#include "igt_edid.h"
+#include "dp_edids.h"
+#include "hdmi_edids.h"
 
 static uint8_t convert_hex_char_to_byte(char c)
 {
@@ -90,3 +93,59 @@ void free_chamelium_edid_from_monitor_edid(struct chamelium_edid *edid)
 	free(edid);
 	edid = NULL;
 }
+
+struct edid *edid_from_monitor_edid(const monitor_edid *monitor_edid)
+{
+	uint8_t *raw_edid;
+	size_t edid_size;
+	int i;
+
+	edid_size = strlen(monitor_edid->edid) / 2; /* each ascii is a nibble. */
+	raw_edid = malloc(edid_size);
+	igt_assert(raw_edid);
+
+	for (i = 0; i < edid_size; i++) {
+		raw_edid[i] = convert_hex_char_to_byte(monitor_edid->edid[i * 2]) << 4 |
+			      convert_hex_char_to_byte(monitor_edid->edid[i * 2 + 1]);
+	}
+
+	if (edid_get_size((struct edid *)raw_edid) > edid_size) {
+		uint8_t *new_edid;
+
+		igt_warn("The edid size stored in the raw edid is shorter than the edid stored in the table.");
+		new_edid = realloc(raw_edid, edid_get_size((struct edid *)raw_edid));
+		igt_assert(new_edid);
+		raw_edid = new_edid;
+	}
+
+	return (struct edid *)raw_edid;
+}
+
+struct monitor_edid *get_edids_for_connector_type(uint32_t type, size_t *count, bool four_k)
+{
+	if (four_k) {
+		switch (type) {
+		case DRM_MODE_CONNECTOR_DisplayPort:
+			*count = ARRAY_SIZE(DP_EDIDS_4K);
+			return DP_EDIDS_4K;
+		case DRM_MODE_CONNECTOR_HDMIA:
+			*count = ARRAY_SIZE(HDMI_EDIDS_4K);
+			return HDMI_EDIDS_4K;
+		default:
+			igt_assert_f(0, "No 4k EDID for the connector %s\n",
+				     kmstest_connector_type_str(type));
+		}
+	} else {
+		switch (type) {
+		case DRM_MODE_CONNECTOR_DisplayPort:
+			*count = ARRAY_SIZE(DP_EDIDS_NON_4K);
+			return DP_EDIDS_NON_4K;
+		case DRM_MODE_CONNECTOR_HDMIA:
+			*count = ARRAY_SIZE(HDMI_EDIDS_NON_4K);
+			return HDMI_EDIDS_NON_4K;
+		default:
+			igt_assert_f(0, "No EDID for the connector %s\n",
+				     kmstest_connector_type_str(type));
+		}
+	}
+}
diff --git a/lib/monitor_edids/monitor_edids_helper.h b/lib/monitor_edids/monitor_edids_helper.h
index 63a183409293..ff5672058816 100644
--- a/lib/monitor_edids/monitor_edids_helper.h
+++ b/lib/monitor_edids/monitor_edids_helper.h
@@ -30,4 +30,7 @@ get_chameleon_edid_from_monitor_edid(struct chamelium *chamelium,
 				     const monitor_edid *edid);
 void free_chamelium_edid_from_monitor_edid(struct chamelium_edid *edid);
 
+struct edid *edid_from_monitor_edid(const monitor_edid *monitor_edid);
+struct monitor_edid *get_edid_for_connector_type(uint32_t type, size_t *count, bool four_k);
+
 #endif /* TESTS_CHAMELIUM_MONITOR_EDIDS_MONITOR_EDIDS_HELPER_H_ */
\ No newline at end of file

-- 
2.43.2